Dave Perry:
This patch adds main gear rotations about the fuselage attach points that keep the wheels in contact with the ground as the compression increases and decreases. I also rotated the main fairings and wheels 4 degrees so the wheel axles are horizontal sitting on the ground. The left and right main gear struts, wheels, and fairings were adjusted to be mirrored (symetric) in the c172p.ac. I also increased the rpm boundary between the Propeller and Propeller.slow selects.
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4 changed files with 988 additions and 926 deletions
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@ -891,24 +891,27 @@
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<!-- Airframe -->
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<animation>
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<type>select</type>
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<object-name>Propeller</object-name>
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<condition>
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<less-than>
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<property>engines/engine[0]/rpm</property>
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<value>200</value>
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<value>500</value>
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</less-than>
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</condition>
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</animation>
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<animation>
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<type>select</type>
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<object-name>Propeller.Slow</object-name>
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<condition>
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<and>
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<greater-than>
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<property>engines/engine[0]/rpm</property>
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<value>190</value>
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<value>400</value>
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</greater-than>
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<less-than>
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<property>engines/engine[0]/rpm</property>
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@ -916,6 +919,7 @@
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</less-than>
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</and>
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</condition>
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</animation>
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<animation>
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@ -1212,15 +1216,15 @@
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<animation>
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<type>rotate</type>
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<object-name>fairing2</object-name>
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<object-name>fairing3</object-name>
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<object-name>RightWheelStrut</object-name>
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<object-name>RightWheel</object-name>
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<property>gear/gear[2]/compression-norm</property>
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<factor>1.9</factor>
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<property>gear/gear[2]/compression-rotation-deg</property>
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<factor>1.0</factor>
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<center>
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<x-m>0.711</x-m>
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<y-m>0.474</y-m>
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<z-m>-0.708</z-m>
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<y-m>0.4518</y-m>
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<z-m>-0.70</z-m>
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</center>
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<axis>
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<x>1.0</x>
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@ -1231,15 +1235,15 @@
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<animation>
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<type>rotate</type>
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<object-name>fairing1</object-name>
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<object-name>fairing2</object-name>
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<object-name>LeftWheelStrut</object-name>
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<object-name>LeftWheel</object-name>
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<property>gear/gear[1]/compression-norm</property>
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<factor>-1.9</factor>
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<property>gear/gear[1]/compression-rotation-deg</property>
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<factor>-1.0</factor>
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<center>
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<x-m>0.711</x-m>
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<y-m>-0.474</y-m>
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<z-m>-0.708</z-m>
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<y-m>-0.4518</y-m>
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<z-m>-0.70</z-m>
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</center>
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<axis>
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<x>1.0</x>
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@ -17,6 +17,10 @@ var navLights = props.globals.getNode("controls/lighting/nav-lights", 1);
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var instrumentsNorm = props.globals.getNode("controls/lighting/instruments-norm", 1);
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var instrumentLightFactor = props.globals.getNode("sim/model/material/instruments/factor", 1);
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var panelLights = props.globals.getNode("controls/lighting/panel-norm", 1);
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var dhR_ft = props.globals.getNode("gear/gear[2]/compression-ft", 1);
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var dhL_ft = props.globals.getNode("gear/gear[1]/compression-ft", 1);
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var propGear1 = props.globals.getNode("gear/gear[1]", 1);
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var propGear2 = props.globals.getNode("gear/gear[2]", 1);
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# Associate Nodes
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@ -28,6 +32,8 @@ var filteredCDI0 = propNav0.getNode("filtered-cdiNAV0-deflection", 1);
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var filteredCDI1 = propNav1.getNode("filtered-cdiNAV1-deflection", 1);
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var filteredGS0 = propNav0.getNode("filtered-gsNAV0-deflection", 1);
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var filteredGS1 = propNav1.getNode("filtered-gsNAV1-deflection", 1);
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var right_main_rot = propGear2.getNode("compression-rotation-deg", 1);
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var left_main_rot = propGear1.getNode("compression-rotation-deg", 1);
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var init_actions = func {
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@ -43,6 +49,25 @@ var init_actions = func {
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var update_actions = func {
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# Compute compression induced main gear rotations
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#
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# constants
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var R_m = 0.919679;
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var h0 = 0.63872;
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var theta0_rad = 0.803068;
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var radTOdeg = 57.295779;
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# Right main
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var delta_h = dhR_ft.getValue()*12/39.4;
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var right_alpha_deg = ( math.acos( (h0 - delta_h)/R_m ) - theta0_rad )*57.295779;
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# Left main
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var delta_h = dhL_ft.getValue()*12/39.4;
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var left_alpha_deg = ( math.acos( (h0 - delta_h)/R_m ) - theta0_rad )*57.295779;
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# outputs
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if ( navLights.getValue() ) {
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instrumentLightFactor.setDoubleValue(1.0);
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# Used double in case one wants to later add the ability to dim the instrument lights
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@ -54,11 +79,12 @@ var update_actions = func {
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panelLights.setDoubleValue(0.0);
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}
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# outputs
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filteredCDI0.setDoubleValue( cdi0_lowpass.filter(cdiNAV0.getValue()));
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filteredCDI1.setDoubleValue(cdi1_lowpass.filter(cdiNAV1.getValue()));
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filteredGS0.setDoubleValue(gs0_lowpass.filter(gsNAV0.getValue()));
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filteredGS1.setDoubleValue(gs1_lowpass.filter(gsNAV1.getValue()));
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right_main_rot.setDoubleValue(right_alpha_deg);
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left_main_rot.setDoubleValue(left_alpha_deg);
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settimer(update_actions, 0);
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}
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@ -96,13 +96,13 @@
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<location unit="IN">
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<x> -6.8 </x>
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<y> 0 </y>
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<z> -20 </z>
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<z> -19.5</z>
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</location>
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<static_friction> 0.8 </static_friction>
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<dynamic_friction> 0.5 </dynamic_friction>
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<rolling_friction> 0.02 </rolling_friction>
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<spring_coeff unit="LBS/FT"> 4000 </spring_coeff>
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<damping_coeff unit="LBS/FT/SEC"> 1000 </damping_coeff>
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<spring_coeff unit="LBS/FT"> 1800 </spring_coeff>
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<damping_coeff unit="LBS/FT/SEC"> 600 </damping_coeff>
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<max_steer unit="DEG"> 10 </max_steer>
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<brake_group> NONE </brake_group>
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<retractable>0</retractable>
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@ -111,12 +111,12 @@
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<location unit="IN">
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<x> 58.2 </x>
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<y> -43 </y>
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<z> -17.9 </z>
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<z> -15.5 </z>
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</location>
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<static_friction> 0.8 </static_friction>
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<dynamic_friction> 0.5 </dynamic_friction>
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<rolling_friction> 0.02 </rolling_friction>
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<spring_coeff unit="LBS/FT"> 4400 </spring_coeff>
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<spring_coeff unit="LBS/FT"> 5400 </spring_coeff>
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<damping_coeff unit="LBS/FT/SEC"> 1600 </damping_coeff>
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<max_steer unit="DEG"> 0.0 </max_steer>
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<brake_group> LEFT </brake_group>
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@ -126,12 +126,12 @@
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<location unit="IN">
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<x> 58.2 </x>
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<y> 43 </y>
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<z> -17.9 </z>
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<z> -15.5 </z>
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</location>
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<static_friction> 0.8 </static_friction>
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<dynamic_friction> 0.5 </dynamic_friction>
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<rolling_friction> 0.02 </rolling_friction>
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<spring_coeff unit="LBS/FT"> 4400 </spring_coeff>
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<spring_coeff unit="LBS/FT"> 5400 </spring_coeff>
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<damping_coeff unit="LBS/FT/SEC"> 1600 </damping_coeff>
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<max_steer unit="DEG"> 0.0 </max_steer>
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<brake_group> RIGHT </brake_group>
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